Every three years, various events and occurrences take place, depending on context. For example, many organizations conduct strategic reviews or set new goals, while certain countries hold elections or referendums. Additionally, in the world of sports, events like the Rugby World Cup and the International Olympic Committee's sessions happen on a three-year cycle. Moreover, some scientific conferences and academic meetings also occur every three years to share the latest research and developments.
A triennial event happens every three years.
Something that happens every three years is a triennialevent.
tercentennial
The phrase "once every 3 years" can be expressed as "triennial." This term refers to an event or occurrence that happens every three years. Alternatively, you could also say "every three years" for clarity.
It is a triennial event. A triennial event happens three times a year.
The word is triennial.
Every person is different-but most likely you will be out a lot of money
Something that happens every six years is sexennial.
Something that happens once a century.
Quadrennial
As far as I know, nothing special happens every 100,000 years. A full precession cycle takes about 26,000 years.
Every three years